Optical unit with shake-correction function

ABSTRACT

An optical unit with shake-correction function is provided. A rotational support structure for supporting a movable body including a camera module around an optical axis is rotatably supported around a first axis and a second axis by a gimbal mechanism. The rotational support structure includes: a first annular groove, provided in the movable body; a plate roller, having a second annular groove facing the first annular groove in a direction of a Z axis; and a plurality of spherical objects, configured to be inserted into the first annular groove and the second annular groove, and roll between the movable body and the plate roller. The gimbal mechanism is configured to rotatably support the plate roller around the first axis.

CROSS REFERENCE TO RELATED APPLICATION

The present application claims priority under 35 U.S.C. § 119 toJapanese Application No. 2020-036404, filed on Mar. 4, 2020, and theentire content of which is incorporated herein by reference.

BACKGROUND Field of the Invention

The present invention relates to an optical unit with shake-correctionfunction for correcting shake by rotating a camera module around anoptical axis.

Description of the Related Documents

In an optical unit mounted on a mobile terminal or a mobile body, thereis an optical unit that rotates a movable body provided with a cameramodule, along an optical axis, a first axis perpendicular to the opticalaxis, and a second axis orthogonal to the optical axis and the firstaxis, in order to suppress the disturbance of an image captured when themobile terminal or the mobile body is moved. Japanese Unexamined PatentPublication No. 2015-82072 (Patent Document 1) and Japanese UnexaminedPatent Publication No. 2019-200270 (Patent Document 2) describe such anoptical unit with shake-correction function.

The optical unit with shake-correction function according to PatentDocument 1 has a movable body, a fixed body, and a rotational supportstructure that rotatably supports the movable body around apredetermined axis with respect to the fixed body. The movable body hasa camera module that includes a lens, a support body that surrounds thecamera module, and a gimbal mechanism that rotatably supports the cameramodule around the first axis and the second axis inside the supportbody. Further, the optical unit with shake-correction function has arotating magnetic drive structure for rotating the camera module aroundthe first axis and the second axis in the movable body, and a rollingmagnet drive structure for rotating the camera module around the opticalaxis by rotating the movable body around a predetermined axis.

The optical unit with shake-correction function of Patent Document 2 hasa movable body that includes a camera module, a rotational supportstructure that rotatably supports the movable body around an opticalaxis, a gimbal mechanism, and a fixed body that supports the movablebody via the gimbal mechanism and the rotational support structure. Themovable body is disposed on the inner circumferential side of the fixedbody. The rotational support structure has an intermediate frame bodydisposed between the movable body and the fixed body, and a plurality ofleaf springs spanned between the movable body and the intermediate framebody in the radial direction. The plurality of leaf springs are arrangedat equal angular intervals around the optical axis, and allow themovable body to rotate around the optical axis with respect to theintermediate frame body. The gimbal mechanism includes a gimbal frame, afirst connecting mechanism that connects a first axis-side extensionpart and the intermediate frame body to be rotatable around the firstaxis, and a second connecting mechanism that connects the gimbal frameand the fixed body to be rotatable around the second axis.

In the optical unit with shake-correction function of Patent Document 1,when the camera module is not rotated around the first axis or thesecond axis, the axis where the rotational support structure rotates themovable body (the rotational axis of the support body) coincides withthe optical axis. However, when the camera module rotates around thefirst axis or the second axis, the rotational axis of the movable bodyby the rotational support structure and the optical axis of the cameramodule on the movable body are displaced from each other. Therefore,when the rolling magnet drive structure is driven to rotate the movablebody while the camera module rotates around the first axis or the secondaxis, there is a problem that the camera module does not rotate aroundthe optical axis.

The optical unit with shake-correction function of Patent Document 2 canrotate the movable body around the rotational axis that coincides withthe optical axis of the camera module, even when the camera modulerotates around the first axis or the second axis. However, since themovable body is rotatably supported by the plurality of leaf springsspanned in the radial direction, there is a problem in that therotational axis of the movable body becomes unstable due to the elasticdeformation of the leaf springs during the rotation.

In the consideration of these points, at least an embodiment of thepresent invention provides an optical unit with shake-correctionfunction, which can rotate a movable body around a rotational axiscoinciding with an optical axis, and prevent or suppress the rotationalaxis of the movable body from becoming unstable.

SUMMARY

The optical unit with a shake-correction function of an embodiment ofthe present invention is provided and includes: a movable body having acamera module; a rotational support structure, configured to rotatablysupport the movable body around an optical axis of a lens of the cameramodule; a gimbal mechanism, configured to rotatably support therotational support structure around a first axis intersecting theoptical axis and rotatably supports the rotational support structurearound a second axis intersecting the optical axis and the first axis;and a fixed body, configured to support the movable body via the gimbalmechanism and the rotational support structure. The rotational supportstructure includes: a first annular groove, provided in the movable bodyin a state coaxial with the optical axis; a plate roller, having asecond annular groove facing the first annular groove in the directionof the optical axis; and a plurality of spherical objects, configured tobe inserted in the first annular groove and the second annular groove,and roll between the movable body and the plate roller. The gimbalmechanism is configured to rotatably support the plate roller.

According to the present invention, the rotational support structurewhich rotatably supports the movable body around the optical axis isrotatably supported by the gimbal mechanism around the first axis andthe second axis. Therefore, the movable body can be rotated around therotational axis that coincides with the optical axis even when themovable body is rotating around the first axis or the second axis.Further, the rotational support structure includes a plurality ofspherical objects that are inserted into the first annular grooveprovided in the movable body and the second annular groove provided inthe plate roller and roll. Therefore, the rotational axis of the movablebody does not become unstable as compared with the case where themovable body is rotatably supported by a plurality of plate springs.Further, in the rotational support structure, the first annular groovefacing the second annular groove of the plate roller in the direction ofthe optical axis is provided in the movable body. Therefore, therotational support structure can be made smaller in the direction of theoptical axis as compared with the case where the first annular groove isprovided in a member separate from the movable body.

In an embodiment of the present invention, the movable body includes: aholder made of metal, configured to hold the camera module; and a firstrail member in an annular shape, being fixed to the holder andsurrounding the optical axis. The first rail member is made of metal,and the first annular groove is provided in the first rail member. Ifthe holder and the first rail member are made of metal, they can befixed by welding and integrated. This can prevent the first rail memberfrom falling off from the holder. In addition, if the first rail memberis made of metal, the first annular groove can be accurately provided bycutting or the like. As a result, the movable body can be rotatedaccurately with respect to the plate roller.

In an embodiment of the present invention, the plate roller includes: aplate roller main body, having an annular plate portion that surroundsthe optical axis; and a second rail member, being fixed to the annularplate portion and surrounding the optical axis. The second annulargroove is provided in the second rail member, and the second rail memberand the first rail member can be the same member. If the second railmember included in the plate roller and the first rail member includedin the movable body are the same member, it is easy to make the firstannular groove and the second annular groove facing each other in thedirection of the optical axis have the same shape. As a result, theplurality of spherical objects inserted in the first annular groove andthe second annular groove can be smoothly rolled.

In an embodiment of the present invention, further includes: a rollingcorrective-magnet drive structure, configured to rotate the movable bodyaround the optical axis. The rolling corrective-magnet drive structureincludes: a rolling corrective magnet, being fixed to the movable body;and a rolling corrective coil, being fixed to the fixed body. The holderis made of magnetic metal and includes: a frame portion, configured tosurround the camera module from an outer circumference side; an annularend plate portion, configured to bend from an end of the frame portionon one side in the direction of the optical axis to an innercircumference side; and a flange portion, configured to bend from an endof the frame portion on the other side in the direction of the opticalaxis to the outer circumference side. The first rail member is fixed tothe end plate portion. The rolling corrective magnet is fixed to theframe portion and is in contact with the flange portion from one side inthe direction of the direction of the optical axis. If the holderincludes an annular end plate portion, it becomes easy to fix the firstrail member to the holder. Also, if the holder is made of magneticmetal, the holder functions as a yoke of the rolling corrective magnet.Therefore, it becomes easy to secure a driving force of the rollingcorrective-magnet drive structure. In addition, the rolling correctivemagnet comes into contact with the flange portion provided on theholder. Therefore, the flange portion functions as a positioning portionfor positioning the rolling corrective magnet in the direction of theoptical axis. Therefore, it is easy to fix the rolling corrective magnetto the holder.

In an embodiment of the present invention, the rotational supportstructure may include: a pressurization structure configured to apply aforce that brings the first annular groove and the second annular groovecloser to each other in the direction of the optical axis. The plateroller is non-magnetic. The pressurization structure includes: amagnetic component, being fixed to a part of the plate roller main bodyin the circumferential direction around the optical axis; and a magnet,being fixed to a part of the end plate portion in the circumferentialdirection to attract the magnetic component. In this way, the holder andthe plate roller can be brought closer to each other by the magneticattraction force between the magnetic component and the magnet.Therefore, the first annular groove and the second annular groove can bebrought closer to each other by the magnetic attraction force. Inaddition, the magnetic component and the magnet that constitute thepressurization structure are both provided in a part of thecircumferential direction around the optical axis. Therefore, when themagnetic component is attracted to the magnet, an angular position ofthe movable body with respect to the plate roller is defined around theoptical axis. Therefore, the pressurization structure can define areference angular position of the movable body around the optical axis.

In an embodiment of the present invention, the plate roller main bodyincludes: a pair of plate roller extension parts, protruding from theannular plate portion on both sides in the direction of the first axis.The gimbal mechanism is configured to rotatably support each plateroller extension part on the first axis around the first axis. Themovable body includes a stopper mechanism fixed to the end plateportion. The stopper mechanism may include a stopper part facing one ofthe plate roller extension parts at an interval from one side in thecircumferential direction. In this way, the stopper mechanism can definean angular range in which the movable body rotates around the opticalaxis.

In an embodiment of the present invention, the stopper mechanism mayinclude a positioning portion configured for arranging the magnet at aposition where the magnet overlaps with the magnetic component whenviewed from the direction of the optical axis. In this way, it becomeseasy to fix the magnet to the holder.

In an embodiment of the present invention, the first rail member and thestopper mechanism are made of metal. A welding mark for fixing the firstrail member and the stopper mechanism to each other is provided onsurfaces of the first rail member and the stopper mechanism on the sideof the end plate portion. The end plate portion may include athrough-hole capable of receiving the welding mark at a position thatoverlaps with the welding mark in the direction of the optical axis. Inthis way, the first rail member and the stopper mechanism can be fixedby welding. Therefore, even if a force is applied to the stoppermechanism from the circumferential direction by the stopper part of thestopper mechanism brought into contact with the plate roller, it ispossible to prevent the first rail member and the stopper mechanism frombeing displaced in the circumferential direction. In addition, since thethrough-hole for receiving the welding mark is provided in the holder,the first rail member and the stopper mechanism can be

In an embodiment of the present invention, the gimbal mechanism mayinclude: a gimbal frame; a first connecting mechanism, configured toconnect each plate roller extension part and the gimbal frame to berotatable around the first axis; and a second connecting mechanism,configured to connect the gimbal frame and the fixed body to berotatable around the second axis. In this way, the gimbal mechanism canrotatably support the rotational support structure around the first axisand the second axis.

In an embodiment of the present invention, further includes: a shakecorrective-magnet drive structure, configured to rotate the movable bodyaround the first axis and the second axis. The shake corrective-magnetdrive structure and the rolling corrective-magnet drive structure arearranged in the circumferential direction around the optical axis. Theshake corrective-magnet drive structure includes: the shake-correctivemagnet, being fixed to the movable body; and a shake-correction coil,being fixed to the fixed body. If the shake corrective-magnet drivestructure and the rolling corrective-magnet drive structure are arrangedin the circumferential direction, the optical unit with theshake-correction function can be made smaller in the direction of theoptical axis as compared with the case where they are arranged in thedirection of the optical axis or the like.

According to the present invention, the rotational support structurewhich rotatably supports the movable body around the optical axis isrotatably supported by the gimbal mechanism around the first axis andthe second axis. Therefore, the movable body can be rotated around therotational axis that coincides with the optical axis even when themovable body is rotating around the first axis or the second axis.Further, the rotational support structure includes a plurality of thespherical objects that are inserted into the first annular grooveprovided in the movable body and the second annular groove provided inthe plate roller and roll. Therefore, the rotation of the movable bodyis stable. Further, the first annular groove of the rotational supportstructure is provided in the movable body. Therefore, the rotationalsupport structure can be made smaller in the direction of the opticalaxis as compared with the case where the first annular groove isprovided in a member separate from the movable body.

BRIEF DESCRIPTION OF THE DRAWINGS

Embodiments will now be described, by way of example only, withreference to the accompanying drawings which are meant to be exemplary,not limiting, and wherein like elements are numbered alike in severalfigures, in which:

FIG. 1 is a perspective view of an optical unit with shake-correctionfunction;

FIG. 2 is a plan view of the optical unit with shake-correction functionwhen viewed from an object side;

FIG. 3 is an exploded perspective view of the optical unit withshake-correction function;

FIG. 4 is a perspective view of an optical unit main body;

FIG. 5 is a plan view of the optical unit main body;

FIG. 6 is a cross-sectional view taken along the line A-A of FIG. 2 ;

FIG. 7 is a cross-sectional view taken along the line B-B of FIG. 2 ;

FIG. 8 is an exploded perspective view of the optical unit main body;

FIG. 9 is a perspective view of a movable body and a rotational supportstructure;

FIG. 10 is an exploded perspective view of the movable body and therotational support structure;

FIG. 11 is an exploded perspective view of the movable body;

FIG. 12 is a perspective view of a first rail member and a stoppermechanism;

FIG. 13 is an exploded perspective view of the rotational supportstructure when viewed from an object side;

FIG. 14 is an exploded perspective view of the rotational supportstructure when viewed from the counter object side;

FIGS. 15A and 15B are perspective views of a gimbal frame receivingmember;

FIG. 16 is a perspective view of a gimbal frame;

FIG. 17 is an explanatory diagram of a rolling drive structure;

DETAILED DESCRIPTION

Hereinafter, embodiments of an optical unit with shake-correctionfunction to which at least an embodiment of the present invention isapplied will be described with reference to the drawings.

Overall Configuration

FIG. 1 is a perspective view of an optical unit with shake-correctionfunction. FIG. 2 is a plan view of the optical unit withshake-correction function when viewed from an object side. FIG. 3 is anexploded perspective view of the optical unit with shake-correctionfunction. FIG. 4 is a perspective view of an optical unit main body. InFIG. 4 , a base, a flexible printed board, a first magnetic plate, and asecond magnetic plate are omitted. FIG. 5 is a plan view of the opticalunit main body. In FIG. 5 , the base and the flexible printed board areomitted. FIG. 6 is a cross-sectional view taken along the line A-A ofFIG. 2 . FIG. 7 is a cross-sectional view taken along the line B-B ofFIG. 2 .

As illustrated in FIG. 1 , the optical unit 1 with shake-correctionfunction includes an optical unit main body 3 that includes a cameramodule 2, a cover 4 that accommodates the optical unit main body 3, anda base 5 that covers the optical unit main body 3 from the counterobject side. The cover 4 includes a cover frame portion 7 with asubstantially rectangular shape that covers the optical unit main body 3from the outer circumference side, and an object-side end plate portion8 with a frame shape that protrudes toward the inner circumferentialside from the edge of the cover frame portion 7 on the object side. Thebase 5 has a plate shape. The camera module 2 includes a lens 2 a, andan imaging element (not illustrated) disposed on an optical axis L ofthe lens 2 a. Further, as illustrated in FIG. 3 , the optical unit mainbody 3 includes a flexible printed board 9 that is routed along theouter circumference surface of the optical unit main body 3.

The optical unit 1 with shake-correction function is used, for example,in an optical device such as a camera-equipped mobile phone or a driverecorder, or an optical device such as an action camera or a wearablecamera mounted on a moving object such as a helmet, a bicycle, or aradio-control helicopter. In such an optical device, when the opticaldevice shakes during capturing, the captured image is distorted. Theoptical unit 1 with shake-correction function corrects the inclinationof the camera module 2, based on the acceleration, the angular velocity,the shake amount, and the like, which are detected by a detection unitsuch as a gyroscope, in order to prevent the captured image from beinginclined.

The optical unit 1 with shake-correction function of the present examplerotates the camera module 2 around the optical axis L of the lens 2 a,around a first axis R1 orthogonal to the optical axis L, and around asecond axis R2 orthogonal to the optical axis L and the first axis R1 toperform shake correction.

In the following description, the three axes orthogonal to one anotherare referred to as the direction of the X axis, the direction of the Yaxis, and the direction of the Z axis. Further, one side in thedirection of the X axis is referred to as a −X direction, and the otherside is referred to as a +X direction. One side in the direction of theY axis is referred as a −Y direction, and the other side is referred asa +Y direction. One side in the direction of the Z axis is referred toas a −Z direction, and the other side is referred to as a +Z direction.The direction of the Z axis is the direction of the optical axis. The −Zdirection is a counter-object side of the camera module 2. The +Zdirection is an object side of the camera module 2. The first axis R1and the second axis R2 are inclined by 45 degrees with respect to the Xaxis and the Y axis around the Z axis (around the optical axis).

As illustrated in FIG. 2 , the optical unit 1 with shake-correctionfunction includes a movable body 10 that includes the camera module 2,and a fixed body 11 that surrounds the movable body 10 from the outside.The fixed body 11 includes the cover 4 and the base 5. As illustrated inFIG. 3 , the optical unit main body 3 includes a rotational supportstructure 12 and a gimbal mechanism 13. The rotational support structure12 rotatably supports the movable body 10 around the Z axis. The gimbalmechanism 13 rotatably supports the rotational support structure 12around the first axis R1 and the second axis R2.

The gimbal mechanism 13 includes a gimbal frame 15, and a firstconnecting mechanism 16 that connects the gimbal frame 15 and therotational support structure 12 so as to be rotatable around the firstaxis R1. The first connecting mechanism 16 is provided on both sides ofthe gimbal frame 15 in the direction of the first axis R1. Further, thegimbal mechanism 13 includes a second connecting mechanism 17 thatconnects the gimbal frame 15 and the fixed body 11 so as to be rotatablearound the second axis R2. The second connecting mechanism 17 isprovided on both sides of the gimbal frame 15 in the direction of thesecond axis R2. Accordingly, the movable body 10 is supported by thefixed body 11 in a state of being rotatable around the first axis R1 andthe second axis R2 via the rotational support structure 12 and thegimbal mechanism 13.

Further, the optical unit main body 3 includes a shake corrective-magnetdrive structure 20 for rotating the movable body 10 around the firstaxis R1 and around the second axis R2. The shake corrective-magnet drivestructure 20 includes a first shake corrective-magnet drive structure 21that generates a driving force around the Y axis with respect to themovable body 10, and a second shake corrective-magnet drive structure 22that generates a driving force around the X axis with respect to themovable body 10. The first shake corrective-magnet drive structure 21and the second shake corrective-magnet drive structure 22 are arrangedin the circumferential direction around the Z axis. In the presentexample, the first shake corrective-magnet drive structure 21 isdisposed in the −X direction of the camera module 2. The second shakecorrective-magnet drive structure 22 is disposed in the −Y direction ofthe camera module 2.

The movable body 10 rotates around the X axis and the Y axis bycombining the rotation around the first axis R1 and the rotation aroundthe second axis R2. Accordingly, the optical unit 1 withshake-correction function performs pitching correction around the Xaxis, yawing correction around the Y axis, and rolling correction aroundthe Z axis.

Further, the optical unit main body 3 includes a rollingcorrective-magnet drive structure 23 for rotating the movable body 10around the Z axis. The first shake corrective-magnet drive structure 21,the second shake corrective-magnet drive structure 22, and, and therolling corrective-magnet drive structure 23 are arranged in thecircumferential direction around the Z axis. In the present example, therolling corrective-magnet drive structure 23 is disposed in the +Ydirection of the camera module 2. The rolling corrective-magnet drivestructure 23 is located on the side opposite to the second shakecorrective-magnet drive structure 22 with the optical axis L interposedtherebetween.

Movable Body

FIG. 8 is an exploded perspective view of the optical unit main body 3.FIG. 9 is a perspective view of the movable body 10 and the rotationalsupport structure 12. FIG. 10 is an exploded perspective view of themovable body 10 and the rotational support structure 12. FIG. 11 is anexploded perspective view of the movable body. FIG. 12 is a perspectiveview of the first rail member and the stopper mechanism. In FIG. 12 ,the first rail member and the stopper mechanism are viewed from the −Zdirection. FIG. 13 is an exploded perspective view of the rotationalsupport structure 12 and the movable body 10 when viewed from the +Zdirection. FIG. 14 is an exploded perspective view of the rotationalsupport structure 12 and the movable body 10 when viewed from the −Zdirection.

As illustrated in FIGS. 10 and 11 , the movable body 10 includes thecamera module 2, a holder 25 that holds the camera module 2, a firstrail member 26 that is fixed to the holder 25, and a stopper mechanism27 that is fixed to the holder 25.

As illustrated in FIG. 11 , the camera module 2 includes a camera modulemain body portion 30, and a camera module cylindrical portion 31 thatprotrudes from the center of the camera module main body portion 30 inthe +Z direction. The lens 2 a is accommodated in the camera modulecylindrical portion 31. The holder 25 includes a holder frame portion 32that surrounds the camera module main body portion 30 from the outercircumference side, a holder end plate portion 33 with a frame shapethat bends from the end of the holder frame portion 32 in the +Zdirection toward the inner circumferential side, and a holder flangeportion 34 that bends from the end of the holder frame portion 32 in the−Z direction toward the outer circumference side. The holder 25 is madeof magnetic metal.

The holder end plate portion 33 includes a circular opening 33 a coaxialwith the optical axis L. The camera module cylindrical portion 31penetrates the circular opening 33 a. The holder end plate portion 33extends in a direction orthogonal to the optical axis L along thesurface of the camera module main body portion 30 in the +Z direction.The holder end plate portion 33 includes through-holes 33 b thatpenetrate the holder end plate portion 33 in the direction of the Z axisat both sides of the first axis R1 where the sides sandwich the circularopening 33 a. Further, the holder end plate portion 33 includes thethrough-holes 33 b that penetrate the holder end plate portion 33 in thedirection of the Z axis at both sides of the second axis R2 where thesides sandwich the circular opening 33 a.

The holder frame portion 32 has an approximately octagonal shape whenviewed from the +Z direction. The holder frame portion 32 includes afirst side wall 35 and a second side wall 36 which extend parallel tothe Y direction, and a third side wall 37 and a fourth side wall 38which extend parallel to the X direction. The first side wall 35 islocated in the −X direction of the second side wall 36. The third sidewall 37 is located in the −Y direction of the fourth side wall 38.Further, the holder frame portion 32 includes a fifth side wall 39 and asixth side wall 40 which are located diagonally in the direction of thefirst axis R1 direction, and a seventh side wall 41 and an eighth sidewall 42 which are located diagonally in the direction of the second axisR2. The fifth side wall 39 is located in the −X direction of the sixthside wall 40. The seventh side wall 41 is located in the −Y direction ofthe eighth side wall 42.

The holder flange portion 34 is provided on the first side wall 35, thethird side wall 37 (see FIG. 14 ), and the fourth side wall 38. Theholder flange portion 34 protrudes in a direction orthogonal to theoptical axis L.

The first rail member 26 has an annular shape, and is made ofnon-magnetic metal. A first annular groove 45 is provided on the endsurface of the first rail member 26 in the +Z direction. In the presentexample, the first annular groove 45 is formed by cutting.

The stopper mechanism 27 is made of non-magnetic metal. The stoppermechanism 27 includes a board 47 having an opening 47 a to which thefirst rail member 26 is fitted in the center thereof. The board 47includes notches 48 at two outer circumferential side portions thatoverlap with the first axis R1 when viewed from the direction of the Zaxis on the edge of the outer circumferential side. Further, the board47 includes notches 48 at two outer circumferential side portions thatoverlap with the second axis R2 when viewed from the direction of the Zaxis on the edge of the outer circumferential side. Further, the stoppermechanism 27 includes, on the edge of the outer circumferential side ofthe board 47, a first bent portion 49 that bends in the +Z directionfrom the edge of the outer circumferential side portion located in the+X direction of the opening 47 a, and a second bent portion 50 thatbends in the +Z direction from the edge of the outer circumferentialside portion located in the −Y direction of the opening 47 a, and athird bent portion 51 that bends in the +Z direction from the edge ofthe outer circumferential side portion located in the +Y direction ofthe opening 47 a. The first bent portion 49 has a width in thecircumferential direction that is longer than that of each of the secondbent portion 50 and the third bent portion 51.

As illustrated in FIGS. 12 and 13 , the first rail member 26 is fixed tothe stopper mechanism 27 by welding in a state of being fitted into theopening 47 a of the stopper mechanism 27. Thereafter, the first railmember 26 is fixed to the holder end plate portion 33 by weldingtogether with the stopper mechanism 27.

More specifically, in the first rail member 26 and the stopper mechanism27, the opening edge of the opening 47 a of the stopper mechanism 27 andthe edge of the outer circumferential side of the first rail member 26are welded from the −Z direction. Further, the welding is performed atfour locations at equal angular intervals around the Z axis. As aresult, as illustrated in FIG. 12 , four welding marks 53, which fix thefirst rail member 26 and the stopper mechanism 27 to each other, areprovided on the surface of the first rail member 26 and the stoppermechanism 27 on the side of the holder end plate portion 33.

Next, the first rail member 26 and the stopper mechanism 27, which areintegrated by welding, are welded to the holder end plate portion 33.Here, when the first rail member 26 and the stopper mechanism 27 arewelded to the holder end plate portion 33, the four welding marks 53 areinserted into the four through-holes 33 b (see FIG. 11 ) of the holderend plate portion 33, respectively. Accordingly, the welding marks 53are received in the through-holes 33 b, respectively. Therefore, thefirst rail member 26 and the stopper mechanism 27 are fixed to theholder 25 in a state of being in close contact with the holder end plateportion 33. In a state in which the first rail member 26 and the stoppermechanism 27 are fixed to the holder 25, as illustrated in FIG. 13 , thefirst rail member 26 is perpendicular to the optical axis, and the firstannular groove 45 is coaxial with the optical axis L.

Further, a first magnet 56, a second magnet 57, a third magnet 58, and afourth magnet 59 are fixed to the holder end plate portion 33. The firstmagnet 56, the second magnet 57, the third magnet 58, and the fourthmagnet 59 are arranged at four locations at equal angular intervals inthe circumferential direction around the Z axis. The first magnet 56 andthe second magnet 57 are fixed to the edge portions on both sides of thecircular opening 33 a in the direction of the first axis R1 in theholder end plate portion 33. The third magnet 58 and the fourth magnet59 are fixed to the edge portions on both sides of the circular opening33 a in the direction of the second axis R2 in the holder end plateportion 33. Each of the magnets 56 to 59 is magnetized with two poles inthe circumferential direction. The magnetic polarization lines of themagnets 56 to 59 extend in the radial direction from the respectivecenters of the magnets 56 to 59 in the circumferential direction.

Here, the first magnet 56, the second magnet 57, the third magnet 58,and the fourth magnet 59 are fixed to the holder end plate portion 33after the first rail member 26 and the stopper mechanism 27 are weldedto the holder end plate portion 33. When the first magnet 56 and thesecond magnet 57 are fixed to the holder end plate portion 33, themagnets 56 and 57 are brought into contact with the opening edges ofeach of the notches 48, which are provided on both sides of the board 47of the stopper mechanism 27 in the direction of the first axis R1,respectively. Further, when the third magnet 58 and the fourth magnet 59are fixed to the holder end plate portion 33, the magnets 58 and 59 arebrought into contact with the opening edges of each of the notches 48,which are provided on both sides of the board 47 of the stoppermechanism 27 in the direction of the second axis R2, respectively. As aresult, each of the magnets 56 to 59 is positioned on the movable body10 in the circumferential direction and in the radial direction.

As illustrated in FIG. 11 , a first shake corrective magnet 61 is fixedto the first side wall 35 of the holder frame portion 32. The firstshake corrective magnet 61 is magnetized with two poles in the directionof the Z axis. A magnetic polarization line 61 a of the first shakecorrective magnet 61 extends in the circumferential direction. A secondshake corrective magnet 62 is fixed to the third side wall 37. Thesecond shake corrective magnet 62 is magnetized with two poles in thedirection of the Z axis. A magnetic polarization line 62 a of the secondshake corrective magnet 62 extends in the circumferential direction. Thefirst shake corrective magnet 61 and the second shake corrective magnet62 are arranged so as to point the same pole in the direction of the Zaxis.

A rolling corrective magnet 63 is fixed to the fourth side wall 38. Therolling corrective magnet 63 is magnetized with three poles in thecircumferential direction. The rolling corrective magnet 63 includes afirst magnetic polarization line 63 a and a second magnetic polarizationline 63 b that extend in parallel to the direction of the Z axis. Thefirst magnetic polarization line 63 a is located in the −X direction ofthe second magnetic polarization line 63 b. The rolling correctivemagnet 63 is disposed on the side opposite to the second shakecorrective magnet 62 with the optical axis L interposed therebetween.

Here, the first shake corrective magnet 61, the second shake correctivemagnet 62, and the rolling corrective magnet 63 abut against the holderflange portion 34 from the +direction of the Z axis. That is, the holderflange portion 34 positions the first shake corrective magnet 61, thesecond shake corrective magnet 62, and the rolling corrective magnet 63in the direction of the Z axis.

Note that, as illustrated in FIG. 9 , a second stopper mechanism 98 isfixed to the stopper mechanism 27 in the +Z direction. The secondstopper mechanism 98 will be described later.

Rotational Support Mechanism

As illustrated in FIGS. 13 and 14 , the rotational support structure 12includes the first annular groove 45 provided on the movable body 10 ina state of being coaxial with the optical axis L, and a plate roller 66having a second annular groove 65 opposed to the first annular groove 45in the direction of the Z axis. Further, the rotational supportstructure 12 includes a plurality of spherical objects 67 which areinserted into the first annular groove 45 and the second annular groove65 and roll between the movable body 10 and the plate roller 66, and anannular retainer 68 which holds the spherical objects 67 so as to berollable. Further, as illustrated in FIG. 9 , the rotational supportstructure 12 includes a pressurization structure 69 that applies a forcefor bringing the first annular groove 45 and the second annular groove65 closer to each other in the direction of the Z axis.

As illustrated in FIG. 10 , the plate roller 66 includes a plate rollerannular portion 70 that surrounds the optical axis L, a pair of plateroller extension parts 71 that protrude from the plate roller annularportion 70 toward both sides in the direction of the first axis R1, anda pair of plate roller protruding portions 76 that protrude from theplate roller annular portion 70 toward both sides in the direction ofthe second axis R2. The second annular groove 65 is provided on theplate roller annular portion 70.

More specifically, as illustrated in FIGS. 13 and 14 , the plate roller66 includes a plate roller main body portion 73 and a second rail member74 having a second annular groove 65. The plate roller main body portion73 includes an annular plate portion 75 that surrounds the optical axisL, the pair of plate roller extension parts 71 that protrude from theannular plate portion 75 toward both sides in the direction of the firstaxis R1, and the pair of plate roller protruding portions 76 thatprotrude from the annular plate portion 75 toward both sides in thedirection of the second axis R2. The second rail member 74 is fixed tothe annular plate portion 75, and surrounds the optical axis L.

Both of the second rail member 74 and the plate roller main body portion73 are made of non-magnetic metal. The second rail member 74 is fixed tothe annular plate portion 75 of the plate roller main body portion 73 bywelding. As a result, the second rail member 74 and the annular plateportion 75 constitute the plate roller annular portion 70. Here, thesecond rail member 74 and the first rail member 26 are the same member.The second rail member 74 and the first rail member 26 are disposedcoaxially with each other, so that the first annular groove 45 and thesecond annular groove 65 face each other in the direction of the Z axis.

Each of the spherical objects 67 is made of metal or a ceramic material.The retainer 68 is made of resin. The retainer 68 is located between thefirst rail member 26 and the second rail member 74 in the direction ofthe Z axis. The retainer 68 includes a plurality of spherical-objectholding holes 68 a that hold the spherical objects 67 so as to berollable, respectively. In the present example, the rotational supportstructure 12 includes six spherical objects 67. The retainer 68 includessix spherical-object holding holes 68 a provided at equal angularintervals. The spherical object 67 is held to be rollable inside thespherical-object holding hole 68 a, and protrudes in the −Z directionand the +Z direction from the retainer 68.

Each of the pair of plate roller extension parts 71 includes a firstportion of the plate roller extension part 77 extending from the annularplate portion 75 in the direction of the first axis R1, a second portionof the plate roller extension part 78 extending the first portion of theplate roller extension part 77 and the outer circumference side of themovable body 10 toward the direction of the Z axis, and a third portionof the plate roller extension part 79 connecting the first portion ofthe plate roller extension part 77 and the second portion of the plateroller extension part 78. The third portion of the plate rollerextension part 79 is bent in the −Z direction toward the direction awayfrom the annular plate portion 75 in the direction of the first axis R1.

The first portion of the plate roller extension part 77 is wider in thecircumferential direction than the third portion of the plate rollerextension part 79 and the second portion of the plate roller extensionpart 78. When viewed from the direction of the Z axis, steps 80 areprovided on both sides in the circumferential direction between thefirst portion of the plate roller extension part 77 and the thirdportion of the plate roller extension part 79.

As illustrated in FIG. 6 , the second portion of the plate rollerextension part 78 faces the movable body 10 with a slight gap on theoutside of the movable body 10 in the direction of the first axis R1. Asillustrated in FIGS. 6, 13 and 14 , a gimbal frame receiving member 83is fixed to each of the second portions of the plate roller extensionpart 78 opposite to the movable body 10. As illustrated in FIG. 4 , eachof the gimbal frame receiving members 83 includes a spherical object 84located on the outer circumference side (opposite side of the movablebody 10) of each of the second portions of the plate roller extensionpart 78, and a thrust receiving member 85 fixed to the second portion ofthe plate roller extension part 78 on the outer circumference side. Thethrust receiving member 85 fixed to the second portion of the plateroller extension part 78 supports the spherical object 84 at a positionseparated from the second portion of the plate roller extension part 78on the first axis R1.

FIGS. 15A and 15B are perspective views of the gimbal frame receivingmember. FIG. 15A is a perspective view of the gimbal frame receivingmember 83 when viewed from the side where the spherical object 84 islocated. FIG. 15B is a perspective view of the gimbal frame receivingmember 83 when viewed from the side opposite to the side where thespherical object 84 is located. As illustrated in FIGS. 15A and 15B, thethrust receiving member 85 includes a plate 88 having a spherical objectfixing portion 87 to which the spherical object 84 is fixed, a pair ofarms 89 protruding to the side where the spherical object 84 is fixedfrom both ends in the circumferential direction in the +Z direction ofthe plate 88 from the spherical object fixing portion 87, and a foot 90protruding from the end of the plate 88 in the −Z direction to the sidewhere the spherical object 84 is fixed.

The plate 88 has a rectangular shape that is long in the direction ofthe Z axis as a whole. The spherical object fixing portion 87 is acircular through-hole provided in the plate 88. The inner diameter ofthe through-hole is smaller than the diameter of the spherical object84. The spherical object 84 is fixed to the thrust receiving member 85by welding while being partially inserted into the spherical objectfixing portion 87. The foot 90 includes a protruding foot plate 90 aprotruding in a direction orthogonal to the annular plate portion 75from the end of the plate 88 in the −Z direction, and a bent foot plate90 b bending in the −Z direction from the end of the protruding footplate 90 a on the side opposite to the plate 88. As illustrated in FIGS.13 and 14 , the gimbal frame receiving member 83 is fixed to the distalend of each of the arms 89 of the thrust receiving member 85, and thebent foot plate 90 b is fixed to the second portion of the plate rollerextension part 78 by welding.

As illustrated in FIG. 9 , the pressurization structure 69 includes afirst magnetic component 91, a second magnetic component 92, a thirdmagnetic component 93, and a fourth magnetic component, which are fixedat four locations in the circumferential direction of the plate roller66, respectively. More specifically, the pressurization structure 69includes the first magnetic component 91 fixed to one of the firstportions of plate roller extension part 77, and the second magneticcomponent 92 fixed to the other of the first portions of the plateroller extension part 77. Further, the pressurization structure 69includes the third magnetic component 93 fixed to one of the plateroller protruding portions 76, and a fourth magnetic component 94 fixedto the other of the plate roller protruding portions 76. The firstmagnetic component 91, the second magnetic component 92, the thirdmagnetic component 93, and the fourth magnetic component 94 are the samecomponent.

As illustrated in FIG. 13 , the shape of each of the magnetic components91 to 94 when viewed from the direction of the Z axis is symmetricalwith respect to a virtual line M, which extends in the radial directionat the center in the circumferential direction. Further, each of themagnetic components 91 to 94 includes a wide portion 95 having a widthin the radial direction wider than both ends in the circumferentialdirection at the center in the circumferential direction. The width ofeach of the magnetic components 91 to 94 in the radial directiongradually increases from both of the ends toward the wide portion 95. Inthe present example, each of the magnetic components 91 to 94 includes arectangular portion 96 that is long in the circumferential direction andhas a rectangular shape, and a trapezoidal portion 97 that is taperedinward in the radial direction from an edge on the inner circumferentialside of the rectangular portion 96.

The first magnetic component 91 and the second magnetic component 92 arefixed to the plate roller extension part 71 in the +Z direction (theside opposite to the holder end plate portion 33 in the direction of theZ axis). The third magnetic component 93 and the fourth magneticcomponent 94 are fixed to the plate roller protruding portion 76 in the+Z direction (the side opposite to the holder end plate portion 33 inthe direction of the Z axis).

When a state in which the first magnetic component 91 and the secondmagnetic component 92 are fixed to the first portion of the plate rollerextension part 77 is viewed from the direction of the Z axis, both edgesof the first magnetic component 91 and the second magnetic component 92in the circumferential direction overlap with both edges of the firstportion of the plate roller extension part 77 in the circumferentialdirection. Further, a portion of the edge of the outer circumferenceside of the first magnetic component 91 and the second magneticcomponent 92 overlaps with the contour of the step 80 of the plateroller extension part 71. Further, when a state in which the thirdmagnetic component 93 and the fourth magnetic component 94 are fixed tothe plate roller protruding portion 76 is viewed from the direction ofthe Z axis, both edges of the third magnetic component 93 and the fourthmagnetic component 94 in the circumferential direction overlap with bothedges of the plate roller protruding portion 76 in the circumferentialdirection. Further, the edge of the outer circumferential side of thethird magnetic component 93 and the fourth magnetic component 94 overlapwith the edge of the outer circumferential side of the plate rollerprotruding portion 76. That is, the shape of each of the first portionsof the plate roller extension part 77 functions as a positioning portionfor positioning the first magnetic component 91 and the second magneticcomponent 92 in the circumferential direction and the radial direction.Further, the shape of the plate roller protruding portion 76 functionsas a positioning portion for positioning the third magnetic component 93and the fourth magnetic component 94 in the circumferential directionand the radial direction.

Further, as illustrated in FIGS. 6, 7, and 13 , the pressurizationstructure 69 includes four magnets 56 to 59 fixed to the holder endplate portion 33 of the holder 25 of the movable body 10. Each of thefour magnets 56 to 59 is arranged at the same angular position when themovable body 10 and the plate roller annular portion 70 of the plateroller 66 are overlapped with each other. That is, each of the magnets56 to 59 overlaps with each of the four magnetic components 91 to 94when viewed from the direction of the Z axis.

Here, as illustrated in FIG. 10 , the notch 48 provided on one side ofthe board 47 of the stopper mechanism 27 in the direction of the firstaxis R1 serves as a first positioning portion for arranging the firstmagnet 56 at a position overlapping with the first magnetic component 91when viewed from the direction of the Z axis. The notch 48 provided onthe other side of the board 47 of the stopper mechanism 27 in thedirection of the first axis R1 serves as a second positioning portionfor arranging the second magnet 57 at a position overlapping with thesecond magnetic component 92 when viewed from the direction of the Zaxis. The notch 48 provided on one side of the board 47 of the stoppermechanism 27 in the direction of the second axis R2 serves as a thirdpositioning portion for arranging the third magnet 58 at a positionoverlapping with the third magnetic component 93 when viewed from thedirection of the Z axis. The notch 48 provided on the other side of theboard 47 of the stopper mechanism 27 in the direction of the second axisR2 serves as a fourth positioning portion for arranging the fourthmagnet 59 at a position overlapping with the fourth magnetic component94 when viewed from the direction of the Z axis.

The magnets 56 to 59 attract the magnetic components 91 to 94 thatoverlap with the respective magnets 56 to 59 in the direction of the Zaxis, respectively. Accordingly, the pressurization structure 69 appliesa force for bringing the first annular groove 45 and the second annulargroove 65 closer to each other in the direction of the Z axis at fourpositions at equal angular intervals around the optical axis L. Themovable body 10 is attracted to the plate roller 66 by the magneticattraction force between each of the magnetic components 91 to 94 of thepressurization structure 69 and each of the magnets 56 to 59, and issupported by the plate roller 66 in a state of being rotatable aroundthe Z axis.

Here, as illustrated in FIG. 9 , when the movable body 10 is supportedby the plate roller 66 in a state of being rotatable around the Z axis,the first bent portion 49 of the stopper mechanism 27 has a first-sidestopper part 49 a that faces one of the plate roller extension parts 71with a gap from one side in the circumferential direction. Thefirst-side stopper part 49 a is an edge on one side of the first bentportion 49 in the circumferential direction. Further, the first bentportion 49 of the stopper mechanism 27 includes a second-side stopperpart 49 b that faces one of the plate roller protruding portions 76 witha gap from the other side in the circumferential direction. Thesecond-side stopper part 49 b is an edge on the other side of the firstbent portion 49 in the circumferential direction.

Further, the movable body 10 includes a second stopper mechanism 98fixed to the stopper mechanism 27. As illustrated in FIG. 10 , thesecond stopper mechanism 98 includes an annular stopper part 99surrounding the optical axis, a first connecting part 100 with asubstantially rectangular shape protruding from the stopper part 99 inthe +X direction, a second connecting part 101 protruding from thestopper part 99 in the −Y direction, and a third connecting part 102protruding from the stopper part 99 in the +Y direction. In the secondstopper mechanism 98, the first connecting part 100 is connected to theend of the first bent portion 49 of the stopper mechanism 27 in the +Zdirection, the second connecting part 101 is connected to the end of thesecond bent portion 50 of the stopper mechanism 27 in the +Z direction,the third connecting part 102 is connected to the end of the third bentportion 51 of the stopper mechanism 27 in the +Z direction, and theseare fixed by welding.

As illustrated in FIGS. 6 and 7 , when the second stopper mechanism 98is fixed to the stopper mechanism 27, the stopper part 99 faces theplate roller annular portion 70 with a predetermined gap from thedirection of the Z axis on the side opposite to the second annulargroove 65 of the plate roller annular portion 70 in the direction of theZ axis. The stopper part 99 prevents the movable body 10 from fallingout from the plate roller 66 in the −Z direction.

Fixed Body

As illustrated in FIG. 8 , the fixed body 11 includes a case 105 with aframe shape that surrounds the movable body 10 and the rotationalsupport structure 12 from the outer circumference side. As illustratedin FIG. 1 , the cover 4 covers the case 105 from the +Z direction. Asillustrated in FIG. 3 , the base 5 closes an opening of the case 105 inthe −Z direction. The case 105, the cover 4, and the base 5 are made ofmetal. The cover 4 and the base 5 are fixed to the case 105 by welding.

The case 105 is made of non-magnetic metal. As illustrated in FIG. 8 ,the case 105 includes a frame plate portion 106 that surrounds theholder 25 from the outside in the radial direction, and a fixedbody-side flange portion 107 that bends from the end of the frame plateportion 106 in the −Z direction and protrudes toward the outercircumference side. The frame plate portion 106 is oriented toward thethickness direction in the radial direction. The base 5 is fixed to thefixed body-side flange portion 107.

The frame plate portion 106 includes a first frame plate portion 111extending toward the direction of the Y axis in the −X direction of themovable body 10, a second frame plate portion 112 extending toward thedirection of the Y axis in the +X direction of the movable body 10, athird frame plate portion 113 extending toward the direction of the Xaxis in the −Y direction of the movable body 10, and a fourth frameplate portion 114 extending toward the direction of the X axis in the +Ydirection of the movable body 10. In the frame plate portion 106, thesecond frame plate portion 112 and the third frame plate portion 113 areconnected to each other by a fifth frame plate portion 115, which isinclined by 45 degree with respect to the second frame plate portion 112and the third frame plate portion 113. In the frame plate portion 106,the first frame plate portion 111 and the fourth frame plate portion 114are connected to each other by a sixth frame plate portion 116, which isinclined by 45 degree with respect to the first frame plate portion 111and the fourth frame plate portion 114. The fifth frame plate portion115 and the sixth frame plate portion 116 face each other in thedirection of the second axis R2. The fifth frame plate portion 115 andthe sixth frame plate portion 116 have a rectangular notch portion 106 aat the end in the +Z direction. That is, the case 105 includes, in theedge in the +Z direction, the notch portion 106 a in a portionoverlapping with the second axis R2 when viewed from the direction ofthe Z axis.

The first frame plate portion 111 and the third frame plate portion 113are connected by a seventh frame plate portion 117, which protrudesoutward in the direction of the first axis R1. Therefore, the firstframe plate portion 111 is offset from the seventh frame plate portion117 in the +X direction. Further, the third frame plate portion 113 isoffset from the seventh frame plate portion 117 in the +Y direction. Theseventh frame plate portion 117 has a bent shape in which the directionof the first axis R1 protrudes toward the outer circumference side, thenextends in the circumferential direction, and the direction of the firstaxis R1 bends toward the inner circumferential side. The fourth frameplate portion 114 and the second frame plate portion 112 are connectedto each other by an eighth frame plate portion 118, which protrudesoutward from the fourth frame plate portion 114 in the direction of thefirst axis R1. The fourth frame plate portion 114 is offset from theeighth frame plate portion 118 in the −Y direction. When viewed from thedirection of the Z axis, the eighth frame plate portion 118 protrudesoutward from the fourth frame plate portion 114 in the direction of thefirst axis R1, then extends in the circumferential direction, and isconnected to the second frame plate portion 112.

A notch 112 a with a rectangular shape is provided at an edge of thesecond frame plate portion 112 in the −Z direction. Here, a flexibleprinted board (not illustrated) is drawn out from the camera module 2 inthe +X direction. The flexible printed board is drawn out to the outsideof the case 105 via the notch 112 a.

The gimbal frame receiving members 83 are fixed to an outer end face ofthe fifth frame plate portion 115 and an outer end face of the sixthframe plate portion 116, respectively. Each of the gimbal framereceiving members 83 is the same member as the gimbal frame receivingmember 83 fixed to the second portion of the plate roller extension part78. Each of the gimbal frame receiving members 83 includes the sphericalobject 84 located on the outer circumference side of the frame plateportion 106 (on the side opposite to the movable body 10), and thethrust receiving member 85 that is fixed to the frame plate portion 106on the outer circumference side and supports the spherical object 84 ata position separated from the frame plate portion 106 on the second axisR2. In each of the gimbal frame receiving members 83, the distal end ofeach of the arms 89 of the thrust receiving member 85 and the bent footplate 90 b are fixed by welding to the fifth frame plate portion 115 andthe sixth frame plate portion 116, respectively.

A first shake-correction coil 121 is fixed to an outer surface of thefirst frame plate portion 111 (a surface on the side opposite to themovable body 10). A second shake-correction coil 122 is fixed to theouter surface of the third frame plate portion 113. Further, two rollingcorrective coils 123 and 124 are fixed to the outer side surface of thefourth frame plate portion 114. The two rolling corrective coils 123 and124 are arranged in the circumferential direction. Here, as illustratedin FIG. 3 , the flexible printed board 9 is routed along the first frameplate portion 111, the first frame plate portion 111, and the fourthframe plate portion 114 on the outer circumference side of the firstshake-correction coil 121, the second shake-correction coil 122, and thetwo rolling corrective coils 123 and 124. The first shake-correctioncoil 121, the second shake-correction coil 122, and the two rollingcorrective coils 123 and 124 are electrically connected to the flexibleprinted board 9.

An oscillation position sensor 130 of the shake corrective-magnet drivestructure 20 is provided on the flexible printed board 9. As illustratedin FIG. 8 , the oscillation position sensor 130 includes a first Hallelement 131 arranged at a position overlapping with the opening of thefirst shake-correction coil 121, and a second Hall element 132 arrangedat a position overlapping with the opening of the secondshake-correction coil 122, when viewed from the radial direction. Theoscillation position sensor 130 detects an oscillation angle around theX axis of the movable body 10 on the basis of the output of the secondHall element 132 disposed at a position overlapping with the opening ofthe second shake-correction coil 122. Further, the oscillation positionsensor 130 detects the oscillation angle around the Y axis of themovable body 10 on the basis of the output of the first Hall element 131disposed at a position overlapping with the opening of the firstshake-correction coil 121.

Further, the flexible printed board 9 is provided with a rotationalposition sensor 135 of the rolling corrective-magnet drive structure 23.The rotational position sensor 135 includes a Hall element 136 thatoverlaps with the opening of the rolling corrective coils 123 whenviewed from the radial direction. The rotational position sensor 135detects the angular position of the movable body 10 around the Z axisbased on the output of the Hall element 136.

Further, as illustrated in FIG. 3 , in the flexible printed board 9, afirst magnetic plate 137 with a rectangular shape is fixed on the outercircumference side of the first shake-correction coil 121. Further, inthe flexible printed board 9, a second magnetic plate 138 with arectangular shape is disposed on the outer circumference side of thesecond shake-correction coil 122.

Gimbal Frame

FIG. 16 is a perspective view of the gimbal frame 15. The gimbal frame15 is made of a metal leaf spring. As illustrated in FIG. 8 , the gimbalframe 15 includes a main body 140 located in the +Z direction of theplate roller 66, a pair of first axis-side extension parts 141 thatprotrude from the main body 140 toward both sides in the direction ofthe first axis R1 and extends in the −Z direction, and a pair of secondaxis-side extension parts 142 that protrude from the main body 140toward both sides in the direction of the second axis R2 and extends inthe −Z direction. As illustrated in FIG. 14 , the main body 140 includesa central portion 140 a with a substantially rectangular shape thatextends in the direction of the first axis R1, a first inclined portion140 b that is inclined in the +Z direction from one side of the centralportion 140 a in the direction of the second axis R2 (−Y direction side)toward the outer circumference side, and a second inclined portion 140 cthat is inclined in the +Z direction from the other side of the centralportion 140 a in the direction of the second axis R2 (+Y direction side)toward the outer circumference side. Further, the main body 140 includesan opening 15 a, which penetrates in the direction of the Z axis in thecenter. As illustrated in FIG. 8 , the camera module cylindrical portion31 of the camera module 2 is located inside the opening 15 a when viewedfrom the direction of the Z axis.

As illustrated in FIG. 16 , each of the pair of first axis-sideextension parts 141 includes a first portion of the first axis-sideextension part 145 that extends in a direction away from the main body140 in the direction of the first axis R1, a second portion of the firstaxis-side extension part 146 that extends the outer circumference sideof the first portion of the first axis-side extension part 145 and themovable body 10 in the direction of the Z axis, and a third portion ofthe first axis-side extension part 147 that connects the first portionof the first axis-side extension part 145 and the second portion of thefirst axis-side extension part 146.

The first portion of the first axis-side extension part 145 protrudesfrom the central portion 140 a in the direction of the first axis R1.The third portion of the first axis-side extension part 147 is inclinedin the −Z direction from the leading edge of the first portion of thefirst axis-side extension part 145 toward the outer circumference side.The second portion of the first axis-side extension part 146 includes afirst axis-side recessed curved surface 148 that recesses the directionof the first axis R1 in the inner circumference side toward the side ofthe movable body 10 on the first axis R1. Further, the second portion ofthe first axis-side extension part 146 includes a pair of rectangularnotches 149 formed by cutting out edges on both ends in thecircumferential direction in the +Z direction of the first axis-siderecessed curved surface 148. By providing the pair of notches 149, thesecond portion of the first axis-side extension part 146 is providedwith a portion having a narrow width in the circumferential direction inthe +Z direction of the first axis-side recessed curved surface 148.

Next, each of the pair of second axis-side extension parts 142 includesa first portion of the second axis-side extension part 151 that extendsin a direction away from the main body 140 in the direction of thesecond axis R2, a second portion of the second axis-side extension part152 that extends the outer circumference side of the first portion ofthe second axis-side extension part 151 and the movable body 10 in thedirection of the Z axis, and a third portion of the second axis-sideextension part 153 that connects the first portion of the secondaxis-side extension part 151 and the second portion of the secondaxis-side extension part 152.

The pair of first portions of the second axis-side extension part 151protrude in the direction of the second axis R2 from the respectiveedges of the outer circumference sides of the first inclined portion 140b and the second inclined portion 140 c. The third portion of the secondaxis-side extension part 153 bends in the −Z direction from the edge ofthe outer circumferential side of the first portion of the secondaxis-side extension part 151. The second portion of the second axis-sideextension part 152 includes a first portion 152 a that extends theoutside of the movable body 10 in the direction of the second axis R2from the third portion of the second axis-side extension part 153 towardthe direction of the Z axis, a bent portion 152 b that bends outward inthe radial direction from the edge of the first portion 152 a in the −Zdirection, and a second portion 152 c that extends toward the −Zdirection from the edge of the outer circumferential side of the bentportion 152 b. The second portion 152 c includes a second axis-siderecessed curved surface 154 that recesses the direction of the secondaxis R2 in the inner circumferential side toward the movable body 10 onthe second axis R2. Further, the second portion 152 c includes a pair ofrectangular notches 155 formed by cutting out edges at both ends in thecircumferential direction in the +Z direction of the second axis-siderecessed curved surface 154. By providing the pair of notches 155, thesecond portion 152 c includes a portion having a narrow width in thecircumferential direction in the +Z direction of the second axis-siderecessed curved surface 154.

Assembly of Optical Unit with Shake-Correction Function

FIG. 17 is an explanatory view of the rolling corrective-magnet drivestructure 23 when viewed from the outside in the radial direction. InFIG. 17 , the fourth frame plate portion 114 of the case 105 locatedbetween the rolling corrective magnet 63 and the two rolling correctivecoils 123 and 124 is omitted.

When assembling the optical unit 1 with shake-correction function, asillustrated in FIG. 8 , the second portion of the first axis-sideextension part 146 of each of the first axis-side extension parts 141 ofthe gimbal frame 15 is inserted between the respective gimbal framereceiving members 83 fixed to both sides in the direction of the firstaxis R1 of the plate roller 66 and the plate roller 66. Then, asillustrated in FIG. 6 , the first axis-side recessed curved surface 148provided on each of the second portions of the first axis-side extensionpart 146 is set in a state of being in contact with the spherical object84 of each of the gimbal frame receiving members 83. Accordingly, thefirst connecting mechanism 16 that connects the rotational supportstructure 12 and the gimbal frame 15 around the first axis R1 isconfigured. Further, at this time, set is a state in which the pair ofarms 89 of the thrust receiving member 85 of each of the gimbal framereceiving members 83 are inserted into the pair of notches 149 providedon each of the second portions of the first axis-side extension part146. This prevents the gimbal frame 15 from falling out from the gimbalframe receiving members 83 located on both sides in the direction of thefirst axis R1 toward the +Z direction.

Here, when the first axis-side recessed curved surface 148 of each ofthe first axis-side extension parts 141 is brought into contact with thespherical object 84 of each of the gimbal frame receiving members 83 onboth sides in the direction of the first axis R1, the pair of firstaxis-side extension parts 141 are bent toward the inner circumferenceside of each other. Therefore, the second portion of the first axis-sideextension part 146 is urged toward the outer circumference side, so thatan urging force from the first axis-side extension part 141 acts on thegimbal frame receiving member 83 fixed to the plate roller 66 via thespherical object 84. Accordingly, the first axis-side recessed curvedsurface 148 of each of the first axis-side extension parts 141 and thespherical object 84 of each of the gimbal frame receiving members 83 canbe maintained with a state of being in contact with each other.

Next, as illustrated in FIG. 4 , the second portions 152 c of each ofthe second axis-side extension parts 142 is inserted between therespective gimbal frame receiving members 83 fixed to both sides in thedirection of the second axis R2 of the case 105 and the case 105. Then,as illustrated in FIG. 7 , the second axis-side recessed curved surface154 provided on each of the second portions 152 c is set in a state ofbeing in contact with the spherical object 84 of each of the gimbalframe receiving members 83. Accordingly, the second connecting mechanism17 that connects the fixed body 11 and the gimbal frame 15 around thesecond axis R2 is configured. Further, at this time, set is a state inwhich the pair of arms 89 of the thrust receiving member 85 of each ofthe gimbal frame receiving members 83 are inserted into the pair ofnotches 155 provided in each of the second portions 152 c. This preventsthe gimbal frame 15 from falling out from the gimbal frame receivingmembers 83 located on both sides in the direction of the second axis R2toward the +Z direction.

Here, when the second axis-side recessed curved surface 154 of each ofthe second axis-side extension parts 142 is brought into contact withthe spherical object 84 of each of the gimbal frame receiving members 83on both sides in the direction of the second axis R2, the pair of secondaxis-side extension parts 142 are bent toward the inner circumferenceside of each other. Therefore, the second portion 152 c is urged towardthe outer circumference side, so that an urging force from the secondaxis-side extension part 142 acts on each of the gimbal frame receivingmembers 83 fixed to the case 105 via the spherical object 84.Accordingly, the second axis-side recessed curved surface 154 of each ofthe second axis-side extension parts 142 and the spherical object 84 ofeach of the gimbal frame receiving members 83 can be maintained with astate of being in contact with each other.

In the state in which the second connecting mechanism 17 is configured,as illustrated in FIGS. 4 and 7 , in the second portion of the secondaxis-side extension part 152 of each of the second axis-side extensionparts 142 of the gimbal frame 15, the bent portion 152 b is disposedinside the pair of notch portions 106 a provided at both ends of thesecond axis R2 of the case 105 of the fixed body 11. Therefore, in thesecond portion of the second axis-side extension part 152, the firstportion 152 a extends toward the direction of the Z axis on the outerside of the movable body 10 in the direction of the second axis R2 onthe inner circumferential side of the frame plate portion 106. The bentportion 152 b overlaps with the frame plate portion 106 of the case 105when viewed from the direction of the Z axis. The second portion 152 cextends in the direction of the Z axis on the outer side of the frameplate portion 106 in the direction of the second axis R2.

As illustrated in FIG. 4 , when the gimbal mechanism 13 is configured,the movable body 10 and the rotational support structure 12 are in astate of being disposed inside the case 105. When the gimbal mechanism13 is configured, the movable body 10 is supported by the case 105 viathe gimbal mechanism 13 and the rotational support structure 12. As aresult, the movable body 10 can oscillate around an intersection P atwhich the optical axis L, the first axis R1, and the second axis R2intersect with one another. As illustrated in FIGS. 6 and 7 , theintersection P is positioned inside the camera module 2.

When the gimbal mechanism 13 is configured, as illustrated in FIG. 5 ,the first shake corrective magnet 61 and the first shake-correction coil121 face each other in the direction of the X axis in a state where thefirst frame plate portion 111 is interposed therebetween. The firstshake corrective magnet 61 and the first shake-correction coil 121constitute the first shake corrective-magnet drive structure 21.Therefore, the movable body 10 rotates around the Y axis due to thepower supply to the first shake-correction coil 121. Further, the secondshake corrective magnet 62 and the second shake-correction coil 122 faceeach other in the direction of the X axis in a state in which the thirdframe plate portion 113 is interposed therebetween. The second shakecorrective magnet 62 and the second shake-correction coil 122 constitutethe second shake corrective-magnet drive structure 22. Therefore, themovable body 10 rotates around the X axis due to the power supply to thesecond shake-correction coil 122. The shake corrective-magnet drivestructure 20 rotates the movable body 10 around the first axis R1 andthe second axis R2 by combining the rotation of the movable body 10around the Y axis by the first shake corrective-magnet drive structure21 with the rotation of the movable body 10 around the X axis by thesecond shake corrective-magnet drive structure 22.

Further, when the gimbal mechanism 13 is configured, the rollingcorrective magnet 63 and the two rolling corrective coils 123 and 124face each other in the direction of the Y axis in a state where thefourth frame plate portion 114 is interposed therebetween. The rollingcorrective magnet 63 and the two rolling corrective coils 123 and 124constitute the rolling corrective-magnet drive structure 23. Therefore,the movable body 10 rotates around the Z axis due to the power supply tothe two rolling corrective coils 123 and 124.

Here, when the state in which the gimbal mechanism 13 is configured isviewed from the radial direction, the magnetic polarization line 61 a ofthe first shake corrective magnet 61 extending in the circumferentialdirection and the opening of the first shake-correction coil 121 overlapwith each other. Therefore, the pair of coil portions extending in thecircumferential direction in the first shake-correction coil 121 servesas an effective side for exerting a driving force around the Y axis.Further, the first shake corrective magnet 61 and the first magneticplate 137 overlaps with each other. The first shake corrective magnet 61and the first magnetic plate 137 constitute a magnetic spring forreturning the movable body 10 to a reference angular position in therotation direction around the Y axis. Further, the first Hall element131 of the oscillation position sensor 130 and the magnetic polarizationline 61 a of the first shake corrective magnet 61 overlap with eachother. Therefore, the oscillation position sensor 130 can acquire theangular position in the rotational direction around the Y axis based onthe output from the first Hall element 131.

Further, the magnetic polarization line 62 a of the second shakecorrective magnet 62 extending in the circumferential direction overlapswith the opening of the second shake-correction coil 122. Therefore, thepair of coil portions extending in the circumferential direction in thesecond shake-correction coil 122 serves as an effective side to exert adriving force to the movable body 10 around the X axis. Further, thesecond shake corrective magnet 62 and the second magnetic plate 138overlaps with each other. The second shake corrective magnet 62 and thesecond magnetic plate 138 constitute a magnetic spring for returning themovable body 10 to the reference angular position in the rotationdirection around the X axis. Further, the second Hall element 132 of theoscillation position sensor 130 and the magnetic polarization line 62 aof the second shake corrective magnet 62 overlap with each other.Therefore, the oscillation position sensor 130 can acquire the angularposition in the rotational direction around the X axis based on theoutput from the second Hall element 132.

Further, as illustrated in FIG. 17 , the first magnetic polarizationline 63 a of the rolling corrective magnet extending in the direction ofthe Z axis overlaps with the opening of the rolling corrective coil 123.Further, the second magnetic polarization line 63 b of the rollingcorrective magnet extending in the direction of the Z axis overlaps withthe opening of the other rolling corrective coil 124. Therefore, in eachof the rolling corrective coils 123 and 124, the pair of coil portionsextending in the direction of the X axis serves as an effective sidethat exerts a driving force for rotating the movable body 10 around theZ axis. Further, the Hall element 136 of the rotational position sensor135 overlaps with the first magnetic polarization line 63 a. Therefore,the rotational position sensor 135 can acquire the angular position inthe rotational direction around the X axis based on the output from theHall element 136.

Next, the cover 4 covers the case 105 from the direction of the Z axis,and these are fixed by welding. As illustrated in FIGS. 1, 2, and 7 ,when the state in which the cover 4 is fixed to the case 105 is viewedfrom the +Z direction, in the object-side end plate portion 8 of thecover 4, the portions located at both ends in the direction of secondaxis R2 and the bent portions 152 b of the gimbal frame 15 face eachother in the direction of the Z axis. Accordingly, the object-side endplate portion 8 serves as a retaining portion for preventing the gimbalframe 15 and the movable body 10 from falling out from the fixed body 11toward the +Z direction in the direction of the Z axis.

Function and Effect

According to the present examples, the rotational support structure 12,which rotatably supports the movable body 10 around the Z axis, isrotatably supported by the gimbal mechanism 13 around the first axis R1and the second axis R2. Therefore, even when the movable body 10 rotatesaround the first axis R1 or the second axis R2, the movable body 10 canbe rotated around the rotational axis that coincides with the opticalaxis L. Further, the rotational support structure 12 includes theplurality of spherical objects 84 that are inserted into the firstannular groove 45 provided on the movable body 10 and the second annulargroove 65 provided on the plate roller 66 and roll. Therefore, therotational axis of the movable body 10 does not become unstable ascompared with the case where the movable body 10 is rotatably supportedby the plurality of leaf springs.

Further, in the rotational support structure 12, the first annulargroove 45 that faces the second annular groove 65 of the plate roller 66in the direction of the Z axis is provided on the movable body 10.Therefore, as compared with the case where the first annular groove 45is provided on a member separate from the movable body 10, it ispossible to reduce the size of the rotational support structure 12 inthe direction of the Z axis.

Further, the movable body 10 includes a metal holder 25 for holding thecamera module 2 and an annular first rail member 26 fixed to the holder25 and surrounding the optical axis L. The first rail member 26 is madeof metal, and the first annular groove 45 is provided in the first railmember 26. Since the holder 25 and the first rail member 26 are made ofmetal, they can be fixed by welding and integrated. As a result, it ispossible to prevent the first rail member 26 from falling off from theholder 25. Further, if the first rail member 26 is made of metal, thefirst annular groove 45 can be accurately provided by cutting or thelike. As a result, the movable body 10 can be rotated accurately withrespect to the plate roller 66.

Further, the plate roller 66 includes a plate roller main body 73 havinga ring-shaped annular plate portion 75 surrounding the optical axis Land a second rail member 74 fixed to the annular plate portion 75 andsurrounding the optical axis L. The second annular groove 65 is providedin the second rail member 74, and the second rail member 74 and thefirst rail member 26 are the same member. Since the second rail member74 included in the plate roller 66 and the first rail member 26 includedin the movable body 10 are the same member, the first annular groove 45and the second annular groove 65 facing each other in the direction ofthe Z axis can have the same shape easily. As a result, the plurality ofspherical objects 84 inserted in the first annular groove 45 and thesecond annular groove 65 can be smoothly rolled.

Further, the rolling corrective-magnet drive structure 23 includes arolling corrective magnet fixed to the movable body 10 and a rollingcorrective coil fixed to the fixed body 11. The holder 25 is made ofmagnetic metal and includes a holder frame portion 32 that surrounds thecamera module 2 from the outer circumference side, an annular bentportion 152 b that bends from one end of the holder frame portion 32 onone side in direction of the Z axis to the inner circumference side, anda holder flange portion 34 that bends from an end of the holder frameportion 32 on the other side in the direction of the Z axis to the outercircumference side. The first rail member 26 is fixed to the bentportion 152 b. The rolling corrective magnet is fixed to the holderframe portion 32 and is in contact with the holder flange portion 34from one side in the direction of the Z axis. Since the holder 25includes the annular bent portion 152 b, it is easy to fix the firstrail member 26 to the holder 25. Also, since the holder 25 is made ofmagnetic metal, the holder 25 functions as a rolling corrective magnet.Therefore, it becomes easy to secure a driving force of the rollingcorrective-magnet drive structure. In addition, the holder flangeportion 34 provided on the holder 25 functions as a positioning portionfor positioning the rolling corrective magnet in the direction of the Zaxis. Therefore, it is easy to fix the rolling corrective magnet to theholder 25.

Further, the rotational support structure 12 includes a pressurizationstructure 69 that applies a force that brings the first annular groove45 and the second annular groove 65 closer to each other in thedirection of the Z axis. The plate roller 66 is non-magnetic, and thepressurization structure 69 includes a magnetic component fixed to apart of the plate roller main body 73 in the circumferential directionaround the Z axis and a magnet fixed to a part of the bent portion 152 bin the circumferential direction and attracting the magnetic component.The magnetic component and the magnet that constitute the pressurizationstructure 69 are both provided in a part of the circumferentialdirection around the Z axis. Therefore, when the magnetic component isattracted to the magnet, an angular position of the movable body 10 withrespect to the plate roller 66 is defined around the Z axis. Therefore,the pressurization structure 69 can define a reference angular positionof the movable body 10 around the Z axis.

In addition, the plate roller 66 includes a pair of plate rollerextension parts 71 protruding from the annular plate portion 75 on bothsides in the direction of the first axis R1. The gimbal mechanism 13rotatably supports each plate roller extension part 71 on the first axisR1 around the first axis R1. The movable body 10 includes a stoppermechanism 27 fixed to the bent portion 152 b. The stopper mechanism 27includes a first-side stopper part 49 a facing one of the plate rollerextension part 71 at an interval from one side in the circumferentialdirection. Therefore, the stopper mechanism 27 can define the angularrange in which the movable body 10 rotates around the Z axis.

Further, the stopper mechanism 27 includes a positioning portion (notch48) for arranging the magnets 56 to 59 at positions overlapping with themagnetic components 91 to 94 when viewed from the direction of the Zaxis. Therefore, it is easy to fix the magnets 56 to 59 of thepressurization structure 69 to the holder 25.

Further, the first rail member 26 and the stopper mechanism 27 are madeof metal, and a welding mark 53 for fixing the first rail member 26 andthe stopper mechanism 27 to each other is provided on the surfaces ofthe first rail member 26 and the stopper mechanism 27 on the side of thebent portion 152 b. The holder end plate portion 33 of the holder 25includes a through-hole 33 b that can receive the welding mark 53 at aposition overlapping with the welding mark 53 in the direction of the Zaxis. Therefore, the first rail member 26 and the stopper mechanism 27can be fixed by welding. As a result, even if a force is applied to thestopper mechanism 27 from the circumferential direction by the stopperpart of the stopper mechanism 27 brought into contact with the plateroller 66, it is possible to prevent the first rail member 26 and thestopper mechanism 27 from being displaced in the circumferentialdirection. In addition, since the through-hole 33 b for receiving thewelding mark 53 is provided in the holder 25, the first rail member 26and the stopper mechanism 27 can be accurately fixed to the holder 25.

Further, the gimbal mechanism 13 includes a gimbal frame 15, the firstconnecting mechanism 16 that connects each plate roller extension part71 and the gimbal frame 15 to be rotatable around the first axis R1, andthe second connecting mechanism 17 that connects the gimbal frame 15 andthe fixed body 11 to be rotatable around the second axis R2. Therefore,the gimbal mechanism 13 can rotatably support the rotational supportstructure 12 around the first axis R1 and the second axis R2.

In addition, the shake corrective-magnet drive structure 20 and therolling corrective-magnet drive structure 23 are arranged in thecircumferential direction around the Z axis. The shake corrective-magnetdrive structure 20 includes the shake-corrective magnet fixed to themovable body 10 and the shake-corrective coil fixed to the fixed body11. Therefore, the optical unit 1 with the shake-correction function canbe made smaller in the direction of the Z axis as compared with the casewhere the shake corrective-magnet drive structure 20 and the rollingcorrective-magnet drive structure 23 are arranged in the direction ofthe Z axis.

Modification

The pressurization structure 69 may include four magnets fixed to theplate roller 66, instead of the magnetic components 91 to 94. Eachmagnet is arranged at a position where it overlaps with each of themagnets 56 to 59 when viewed from the direction of the Z axis.

In addition, the magnetic components and magnets of the pressurizationstructure 69 are provided at four locations around the optical axis L,but they may be provided at two locations on both sides of the opticalaxis L in between.

Note that the first annular groove 45 may be formed on the holder endplate portion 33 of the holder 25. Further, the second annular groove 65may be formed on the annular plate portion 75 of the plate roller mainbody portion 73.

Further, the stopper mechanism 27 may include the second-side stopperpart facing the other plate roller extension part 71 from the other sidein the circumferential direction at an interval, instead of thesecond-side stopper part 49 b facing the plate roller protruding portion76 from the other side in the circumferential direction at an interval.For example, the other side stopper part may be provided on the secondbent portion 50.

What is claimed is:
 1. An optical unit with shake-correction function,comprising: a movable body including a camera module; a rotationalsupport structure, configured to rotatably support the movable bodyaround an optical axis of a lens of the camera module; a gimbalmechanism, configured to rotatably support the rotational supportstructure around a first axis intersecting the optical axis and around asecond axis intersecting the optical axis and the first axis; and afixed body, configured to support the movable body via the gimbalmechanism and the rotational support structure, wherein the rotationalsupport structure includes: a first annular groove, provided in themovable body coaxially with the optical axis; a plate roller, having asecond annular groove facing the first annular groove in the directionof the optical axis; and a plurality of spherical objects, configured tobe inserted into the first annular groove and the second annular groove,and roll between the movable body and the plate roller, and wherein thegimbal mechanism is configured to rotatably support the plate rolleraround the first axis.
 2. The optical unit with shake-correctionfunction according to claim 1, wherein the movable body includes: aholder made of metal, configured to hold the camera module; and a firstrail member in an annular shape, being fixed to the holder andsurrounding the optical axis; wherein the first rail member is made ofmetal; and the first annular groove is provided in the first railmember.
 3. The optical unit with shake-correction function according toclaim 2, wherein the plate roller includes: a plate roller main body,having an annular plate portion surrounding the optical axis; and asecond rail member, being fixed to the annular plate portion andsurrounding the optical axis; wherein the second annular groove isprovided in the second rail member; and the second rail member and thefirst rail member are the same member.
 4. The optical unit withshake-correction function according to claim 2, further comprising: arolling corrective-magnet drive structure, configured to rotate themovable body around the optical axis, wherein the rollingcorrective-magnet drive structure includes: a rolling corrective magnet,being fixed to the movable body; and a rolling corrective coil, beingfixed to the fixed body; wherein the holder is made of magnetic metaland includes: a frame portion, configured to surround the camera modulefrom an outer circumference side; an annular end plate portion,configured to bend from an end of the frame portion on one side in thedirection of the optical axis to an inner circumference side; and aflange portion, configured to bend from an end of the frame portion onthe other side in the direction of the optical axis to an outercircumference side; wherein the first rail member is fixed to the endplate portion; and the rolling corrective magnet is fixed to the frameportion and is in contact with the flange portion from one side in thedirection of the optical axis.
 5. The optical unit with shake-correctionfunction according to claim 4, wherein the rotational support structureincludes: a pressurization structure configured to apply a force thatbrings the first annular groove and the second annular groove closer toeach other in the direction of the optical axis; wherein the plateroller is non-magnetic; wherein the pressurization structure includes: amagnetic member, being fixed to a part of the plate roller main body inthe circumferential direction around the optical axis; and a magnet,being fixed to a part of the end plate portion in the circumferentialdirection to attract the magnetic component.
 6. The optical unit withshake-correction function according to claim 4, further comprising: ashake-corrective magnet drive structure, configured to rotate themovable body around the first axis and around the second axis, whereinthe shake corrective-magnet drive structure and the rollingcorrective-magnet drive structure are arranged in a circumferentialdirection around the optical axis; wherein the shake-corrective magnetdrive structure includes: a shake-corrective magnet, being fixed to themovable body; and a shake-corrective coil, being fixed to fixed body. 7.The optical unit with shake-correction function according to claim 5,wherein the plate roller main body includes: a pair of plate rollerextension parts, protruding from the annular plate portion on both sidesin the direction of the first axial; wherein the gimbal mechanism isconfigured to rotatably support each plate roller extension part on thefirst axis around the first axis; the movable body includes a stoppermechanism fixed to the end plate portion; and the stopper mechanismincludes a stopper part facing one of the plate roller extension partsat an interval from one side in the circumferential direction.
 8. Theoptical unit with shake-correction function according to claim 7,wherein the stopper mechanism includes a positioning portion configuredfor arranging the magnet at a position where the magnet overlaps withthe magnetic component when viewed from the direction of the opticalaxis.
 9. The optical unit with shake-correction function according toclaim 7, wherein the gimbal mechanism includes: a gimbal frame; a firstconnecting mechanism, configured to connect each plate roller extensionpart and the gimbal frame to be rotatable around the first axis; and asecond connecting mechanism, configured to connect the gimbal frame andthe fixed body to be rotatable around the second axis.
 10. The opticalunit with shake-correction function according to claim 8, wherein thefirst rail member and the stopper mechanism are made of metal; a weldingmark for fixing the first rail member and the stopper mechanism to eachother is provided on surfaces of the first rail member and the stoppermechanism on the side of the end plate portion; and the end plateportion includes a through-hole capable of receiving the welding mark ata position that overlaps with the welding mark in the direction of theoptical axis.